How to crochet a spiral scarf

Measurement:
1350 mm x 120 mm

Materials:
150 Grams semi thick wool with lurex fantasy, aluminum needle No. 5.5.

Stitches:
Chain Stitch, Half Double Crochet, Double crochet, Treble Crochet, Double Treble Crochet

Realization:

145 ch and work like this:

1°r: skip 3 ch and 1 h.d.c stung on each next ch

2°r: 3 ch and 2 d.c. stung on each next h.d.c

3°r: 4 ch and *1 t.r. stung on next d.c., 2 t.r. stung on next d.c.* rep. from * to * across all the r.

4°r: 5 ch and *2 d.t.r. stung on next 2 t.r., 2 d.t.r. stung on next t.r.* rep. from * to * across all the r.

References:
mm: millimeters
Rep: repeat
r.: row
ch: chain stitch
h.d.c: half double crochet
d.c.: double crochet
t.r.: treble crochet
d.t.r: double treble crochet